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# How Hoot Calculates Your Macros

# The Science Behind Your Macros

Hoot builds your macro targets using a simple, science-backed sequence:  
​**first calories → then protein → then fat → then carbs.**

Your calorie target sets the foundation. From there, Hoot uses evidence-based defaults that protect your metabolism, support hormone health, and keep energy steady — without forcing you into any rigid diet style.

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# 1. Your Calorie Target (The Starting Point)

Everything begins with your total daily calorie needs, calculated using the **Mifflin–St Jeor equation**, the gold-standard formula for estimating metabolism.

We then multiply your BMR by your activity level and adjust for your goal (lose, maintain, gain). To keep things safe and sustainable, Hoot enforces **minimum daily calorie floors**:

* **1,200 calories/day** for women
* **1,500 calories/day** for men
* **1,350 calories/day** for other genders

Your macros are built on top of this personalized calorie target.

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# 2. Protein — Your Foundation Macro

**Default Target:**  
​**0.8 grams per pound of body weight**

Protein is set **first** because it’s essential for:

* Maintaining and building lean muscle
* Feeling full and reducing overeating
* Supporting recovery and performance
* Minimizing muscle loss during weight loss

Modern research shows the optimal range for active adults is **0.7–1.0 g/lb**, so Hoot’s 0.8 g/lb target hits the evidence-backed sweet spot without being extreme.

Once your protein grams are set, we convert them to calories (4 kcal/g) and lock them in.

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# 3. Fat — Essential for Hormones & Health

**Default Target:**  
​**30% of daily calories**  
​**Minimums:**

* **40 g/day** for men
* **30 g/day** for women
* **35 g/day** for other genders

Fat is set **second** because it’s required for:

* Hormone production (estrogen, testosterone, cortisol)
* Absorption of vitamins A, D, E, K
* Nervous system function
* Sustained energy and satiety

The 30% target sits in the middle of the **20–35%** recommended range from major health authorities and avoids the hormonal downsides of very low-fat diets.

Once your fat calories are calculated, we convert them to grams (9 kcal/g).

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# 4. Carbohydrates — Your Flexible Fuel

**Formula:**  
​`Carb Calories = Total Calories − (Protein Calories + Fat Calories)`  
​`Carb Grams = Carb Calories ÷ 4`

Carbs are assigned **last**, because:

* Protein and fat provide essential amino and fatty acids
* Carbs do not have a minimum biological requirement
* Your carb needs vary depending on activity, appetite, and personal preferences

This makes carbs your **flexible macro**, adapting to you rather than forcing you into a rigid ratio.

Carbs support:

* Energy for workouts
* Cognitive function
* Mood and focus
* Digestive health (through fiber-rich sources)

Hoot encourages nutrient-dense carbohydrates like fruits, vegetables, legumes, and whole grains.

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# Why This Macro System Works

Hoot’s macro approach is simple but scientifically grounded:

* **Calories set the framework**
* **Protein protects muscle and controls hunger**
* **Fat supports hormones and nutrient absorption**
* **Carbs fill the remaining calories**, giving you flexibility and energy

This structure aligns with modern sports nutrition, clinical nutrition, and behavioral research — ensuring your plan is balanced, sustainable, and personalized.

Simple. Flexible. Based on your calories.  
That’s how Hoot makes macros work for real life.